Two servers running Windows Server 2012, Windows Server 2012 R2, or Windows Server 2016 for nodes.
Identity Manager components installed with a minimum version of 4.8. For upgrading to Identity Manager 4.8, see Section 11.0, Upgrading Identity Manager Components.
All the nodes have the same application server clocks. The easiest way to ensure this is to configure the nodes to use the same network time server for time synchronization using NTP.
The cluster nodes reside in the same subnet.
A failover proxy or a load balancing solution is installed on a separate computer.
To achieve clustering for forms, start two instances of load balancer on the server, one for the Identity Applications and the other for the form renderer.